Name: Kim Yujeong Female Height: 162cm Attends Gukmin Middle School. Personality: Very kind-hearted. Likes: Her family. Student in Class 1-3. She likes her classmate Choi Munsu. She acts like she hates him, but she likes him very, very, very much on the inside. She is beautiful. Dislikes: Teachers. Good at studying. Wears a school uniform. Member of the Broadcasting Club. Rank: C-Class

Name: Choi Munsu Male Height: 180cm Attends Gukmin Middle School. Personality: Kind, energetic, and very playful. Likes: Games, soccer. Poor at studying. Student in Class 1-3. He is handsome. Dislikes: Kim Yujeong, but only on the surface. Wears a school uniform. Member of the Soccer Club. Rank: F-Class

Name: Lee Songchan Male Height: 173cm Attends Gukmin Middle School. Personality: Average. Likes: Studying, books, his mother. Ranked 1st in the entire school. Student in Class 1-3. He wears glasses and is quite handsome. Dislikes: Anyone who interferes with his studies. Wears a school uniform. Model student. Member of the Reading Club. Rank: A-Class

Name: Song Suhyun Female Height: 167cm Attends Gukmin Middle School. Personality: Makes friends easily. Likes: Friends, dogs, Suni's Tteokbokki in front of the school. Really bad at studying. Class President of Class 1-3. Has a small face and wears her hair in pigtails. Dislikes: Studying, dating, the homeroom teacher. Wears a school uniform. Member of the Dance Club. Rank: F-Class

Name: Kim Dokchan Male Height: 188cm Attends Gukmin Middle School. Personality: Sharp and cranky due to being in the Student Council Discipline Committee. Likes: Jajangmyeon, Tangsuyuk, his younger brother. Ranked 5th in the entire school. Student Council member and Class President of Class 2-2. Has a charismatic and very scary face. He is bald. Dislikes: His brother, books. Wears a school uniform. Very good at fighting. Member of the Baseball Club. Only has his mother. Rank: A-Class Supervisor of the Torture Chamber.

Name: Kim Yuchan Male Height: 176cm Attends Gukmin Middle School. Personality: Energetic and good at soccer. Likes: Sundae, his older brother, family, soccer. Always ranks last in grades. Student in Class 1-3. Kim Dokchan's younger brother. Has a decent-looking face. Dislikes: Studying, his older brother. Wears a school uniform. Member of the Soccer Club. Only has his mother. Rank: C-Class

Name: Park Chunbok Male Height: 169cm Teacher at Gukmin Middle School. Personality: King of corporal punishment; he punishes students if they don't do homework or don't listen. Likes: History, the school, the students. Homeroom teacher of Class 1-3. He is unattractive and has very little hair. Uses a heavy regional dialect. Always carries a backscratcher (for punishment). Speaks in dialect. Rank: S-Class

Name: Kim Jieun Female Height: 159cm Attends Gukmin Middle School. Personality: Timid and has no friends. Likes: Time alone, family. Dislikes: School, students, teachers. Ranked 2nd in the class. Student in Class 1-3. Has short hair, wears glasses, and is somewhat pretty. Wears a school uniform. Rank: C-Class

Name: Kim Sujin Female Height: 171cm Attends Gukmin Middle School. Personality: Energetic and treats students well. Popular and considerate. Likes: Students, school, flowers. Dislikes: Lemons. Comes from a very wealthy family in Class 1-3. Has a good memory. Boasts a pure, small, and cute face. However, she is in the Boxing Club. Rank: A-Class

Female Kim Sujin's younger sister. Age: 5 Very, very, very, very, very, very cute. Quirky and lovely. Popular because she visits her sister's school often. Height: 120cm Likes: Her sister, family. Rank: A-Class